Car-brake.



J. P. & 0. W. SIBVER.

GAR BRAKE.

APPLICATION FILED MAY 1, 1912 Patented J an. 14, 1913.

affomq UNITED STATES PATENT OFFICE.

JOHN F. SIEVER AND CHARLES W. SIEVER, OF KEYSER, WEST VIRGINIA.

CAR-BRAKE.

Specificationof Letters Patent.

Patented Jan. 14:, 1913.

Application filed May 1, 1912. Serial No. 694,499.

To all whom it may concern:

Be it known that we, JOHN F. Srnvnn and CHARLES W. SIEVER, citizens of the United States, residing at Keyser, in the county of Mineral and State of Vest Virginia, have invented new and useful Improvements in Car-Brakes, of which the following is a specification.

The general object of the invention is to refine the construction of the operating mechanism of hand brakes for cars by silo-- plifying the construction for securing "the locking device for the brake post, and by rendering it easy to effect the lockino and unlocking of the brake post; and to this end the invention consists in certain improved constructions, arrangements, and combinations of devices which will be fully described hereinafter, and then pointed out in the claims.

Other objects will appear and be better understood from that embodiment of our invention of which the following is a specification, reference being had to the accompanying drawings forming a part hereof, in which; I

Figure 1 is a perspective view illustrating the invention. Fig. 2 is a plan with parts broken away to disclose the structure and arrangement of the means for locking the brake post. Fig. 3 is a transverse section on the line 3-8 of Fig. 2. Fig. 4 is a sectional detail showing the means for locking together the brake post and the toothed wheel.

Broadly stated, our invention resides in arranging the locking mechanism forthe brake post in a suitable box which is adapted to be connected to the platform of a passenger car or to the wall, brake shelf, or bumper of the freight car and which is also adapted to dispense with the usual collars, castings 0r analogous devices heretofore employed for securing the brake post against longitudinal movement.

The box a is preferably of metal and of any suitable contour, such as rectangular. The bottom 5 is arranged on the supporting surface of the car and is inclosed by the sides and ends 66 so as to be flush with the lower edges of the said sides and ends, which are by preference, formed integral with or otherwise suitably secured to the top 7 The blocks or bosses 8 at the four corners of the box and through which pass the fastening bolts 9 for securing or clamping together the parts of the box, serve to strengthen the box and maintain the bottom 5 and top 7 in their relative positions as shown in Fig. 2, by forming abutments for the bottom 5.

The brake post 10 which as shown, passes through the top and bottom of the box, also passes through the wheel 11 which forms part of the locking mechanism and which is located in the box and confined against longitudinal movement on the post 10, by the top and bottom of the box. The wheel has a key way 12 to receive the key 13 which is also received by the key way 14 in the post 10. The key way 14 is formed by milling a curved recess in the post and thereby the relatively difiicult operation of gouging out a rectangular-shaped key way, is eliminated. The curved wall of the key way 14 moreover acts as a cam on the curved surface 15 of the key 13 when, by virtue of wear, slight lateral movement of the post in the wheel 11 is permitted. In the aforesaid event of wear and upon a lateral pull on the brake post one end of the key will be projected outwardly from the brake post and for a distance to compensate for such wear. This will always insure of a tight fit of the key in the key ways, and especially at the beginmug of turning movement of the brake post, and thus insure against accidental slipping of the key or turning thereof out of the key ways. The key is formed at one end with a lateral extension 16 which is received by either of the lateral recesses 17 at the opposite ends of the key way 12. The function of the extension 16 is to prevent longitudinal movement of the brake post by bearing or abutting on the surface of the box. Thus, it will be seen that the key while pre venting independent rotary movement of the post and wheel, also cooperates with the box to prevent endwise movement of the post in one direction and cooperates with the wheel to prevent endwise movement of the post in an opposite direction.

The teeth 18 are triangular in cross section and the surface 19 of the dog 20 corresponds to the inclination of the sides of the teeth. This admits of disengaging the dog by simply pressing with the foot on the free end thereof, and thereby obviates the usual procedure in releasing the brakes of first turningthe brake post for a sufficient distance to permit of moving the dog from engagement with one of theteeth, which procedure is made necessary when curved or ratchet teeth are provided.

The dog is pivoted on opposing cones 2121 which project from the top and bottom respectively, of the box and the free end portion of the dog projects through a recess 22 in one end of the box which is normally sealed by a lug 23 carried by the dog. The provision of the lug together with the arrangement of the bottom 5, renders the box when the dog is in the normal position, substantially water and dust proof. This is very desirable when the device is used on cars of the freight type where the brake opcrating mechanism is always exposed to the elements and to dirt and dust all of which frequently operate to prevent free action of the dog when the latter is unhoused.

The dog in the present instance is pressed by a spring 24 into engagement with the tooth surface of the wheel 11. This arrangement obviates the. holding of the dog by the foot during the operation of tightening the brakes, which is always necessary when a spring is not employed and the dog arranged in horizontal position. Thus, it will be seen that the device in the operation of tightening the brakes, operates automatically to lock the brake post whenever the latter is released.

What we claim as new is:

1. In a brake operating mechanism, the combination of a box arranged on a car and having a slot therein, a brake post passing through said box, a toothed wheel keyed to said brake post and located in said box, a

spring pressed dog extending through the In testimony whereof we afiix our signatures in presence of two witnesses.

JOHN F. SIEVER. CHARLES V. SIEVER. Witnesses H. L. ARNOLD,

P. J DAVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

